Just like other adjectives, the adjectives produced by these suffixes can be reused as nouns denoting people or things that have the specified quality.

-in is added to a noun to create an adjective meaning "similar to ...", "-like", "-ish":

ami – friend > amin – friendly

enfante – child > enfantin – childlike / childish

fantasma – ghost > fantasmin – ghostly

menta – mint > mentin – minty

monstro – monster > monstrin – monstrous

serpente – snake > serpentin – snakelike / serpentine

-osa is added to a noun to make an adjective meaning "full of ..." or "made of ...":

zucar – sugar > zucarosa – sugary

oro – gold > orosa – made of gold

capel – capelos > capelosa – hairy

festa – holiday > festosa – festive

melma – slime > melmosa – slimy

jua – game > juosa – playful

caos – chaos > caososa – chaotic

-al is added to a noun to form a general adjective meaning "pertaining to ..." or "to do with ...":

fotografia – photography > fotografial – photographic

nasion – nation > nasional – national

siensa – science > siensal – scientific

averbo – adverb > averbal – adverbial

erita – inheritance > erital – hereditary

mito – myth > mital – mythical

monce – monk > moncal – monastic

-iste is added to a noun denoting a belief, such as a religion or a philosophy, to make a general adjective. If the noun ends in -isme, then -iste takes its place. In some words where the root is a proper noun, the noun's final vowel is retained if this produces a more international word:

bigamia – bigamy > bigamiste – bigamous

otimisme – optimism > otimiste – optimist

puria – cleanliness > puriste – puristic

Mitra – Mithras > mitraiste – Mithraist

-an is added to a few nouns denoting extents of space or time (places and eras) to form general adjectives:

suburbe – suburb > suburban – suburban

Victoria – Victoria > victorian – Victorian

-an is also one of the five standard suffixes for forming adjectives that denote languages and peoples. The other four are -es, -ica, -i, and -sce. For these adjectives, LFN uses words that sound as similar to the native names as possible: as a result, some names use a special suffix of their own, or no suffix at all, and the root is sometimes modified too:

Africa – Africa > african – African

Frans – France > franses – French

Elas – Greece > elinica – Greek

Arabia – Arabia > arabi – Arabian

Rusia – Russia > rusce – Russian

Europa – Europe > european – European

Deutxland – Germany > deutx – German

Britan – Britain > brites – British

-ica is added to a noun denoting a medical, psychological, or similar problem, to form an adjective that describes a person who has the problem:

catalesia – catalepsy > catalesica – cataleptic

xenofobia – xenophobia > xenofobica – xenophobic

-nte is added to a verb to create the active participle, an adjective that means "-ing", i.e. "such that it does (the specified action)". The active participle of es is esente:

ama – to love > amante – loving

depende – to depend > dependente – dependent

dormi – to sleep > dorminte – asleep

obedi – to obey > obedinte – obedient

pare – to appear / to seem > parente – apparent

es – to be > esente – being

Nouns ending in -nte are not used as names of actions:

La covrente es sur la caxa. – The lid/covering is on the box.

Covre la caxa es un bon idea. – Covering the box is a good idea.

-da is added to a verb to form the passive participle, an adjective that means "-ed", i.e. "such that it has or has had ... done to it":

ama – to love > amada – beloved

clui – to close > cluida – closed

conose – to know > conoseda – known

jela – to freeze > jelada – frozen

nesesa – to need > nesesada – needed / necessary

putri – to rot > putrida – rotten

One does not use -da to indicate the past tense of verbs:

La caxa es covreda par la tela. - at this time, the cloth covers the box.

La tela ia covre la caxa. - in the past, the cloth covered the box.

-able is added to a verb to make an adjective that means "-able", "capable of having ... done to it", or "worthy of having ... done to it":

-or means "-er". When added to a verb, it makes a noun meaning a person who performs the specified action, often typically or habitually. When added to a noun, it makes a noun meaning a person who works with the specified thing, or plays the specified sport:

aida – to help > aidor – helper

deteta – to detect > detetor – detective

dirije – to direct > dirijor – director

fumi – to smoke > fumor – smoker

gania – to win > ganior – winner

jogla – to juggle > joglor – juggler

parla – to speak > parlor – speaker (person)

pexa – to fish > pexor – fisherman

carne – meat > carnor – butcher

vaso – pot > vasor – potter

futbal – football > futbalor – footballer

tenis – tennis > tenisor – tennis player

-ador also means "-er", but creates nouns meaning a tool or machine that performs the specified action, or works on the specified thing:

caldi – heat > caldador – heater

computa – compute > computador – computer

fax – fax > faxador – fax machine

lava – wash > lavador – washing machine / dishwasher

parla – speak > parlador – loudspeaker

surfa – surf / browse > surfador – (web) browser

umidi – dampen > umidador – humidifier

-eria is added to a noun or verb to make a noun meaning a place, often a shop, associated with the specified action or thing:

cafe – coffee > caferia – cafe

pan – bread > paneria – bakery, baker's shop

beli – beautify > beleria – beauty salon

campana – bell > campaneria – bell tower

fruto – fruit > fruteria – orchard

monce – monk > monceria – monastery

planeta – planet > planeteria – planetarium

xef – chief / leader > xeferia – headquarters

-ia is equivalent to "-ness" or "-ity" or "-ship" or "-hood" in English. It forms abstract nouns that serve as the names of qualities. When -ia is added to a word that ends in -ia, the word doesn't change:

ajil – agile > ajilia – agility

felis – happy > felisia – happiness

jelosa – jealous > jelosia – jealousy

neutra – neutral > neutria – neutrality

madre – mother > madria – motherhood

enfante – child > enfantia – childhood

sultan – sultan > sultania – sultanate

fria – cold > fria – coldness

vea – old / old person > veia – old age

Words like enfantia and sultania can denote a or time or place in which the quality exists.

The names of many fields of study also end in ia (or ica) but this is part of the root, and not a suffix. The names of the corresponding practitioners are formed with -iste. -iste is also used to form the names of believers in a religion or philosophy (as derived from the adjectival suffix -iste), the names of musicians, and the names of certain other people that end in "-ist-" internationally:

jeografia – geography > jeografiste – geographer

psicolojia – psychology > psicolojiste – psychologist

cimica – chemistry > cimiciste – chemist

eletrica – electricity > eletriciste – electrician

musica – music > musiciste – musician

Crixna – Krishna > crixnaiste – Krishnaist

ideal – ideal > idealiste – idealist(ic)

gitar – guitar > gitariste – guitarist

solo – solo > soliste – soloist

jornal – journal > jornaliste – journalist

sicle – cycle > sicliste – cyclist

-isme forms the names of belief systems, replacing -iste in the name of the believer. It also occurs in certain other words that end in "-ism-" internationally:

The following suffixes are only applied to specific words, as defined in the dictionary.

-eta is added to certain nouns to create a name for a version of something that has been reduced in a particular way. This includes the names of young animals and inner garments. -eta can similarly be added to a few verbs to create words for reduced versions of actions:

bebe – baby > bebeta – newborn baby

caro – cart > careta – wheelbarrow

imaje – image > imajeta – thumbnail

lente – lens > lenteta – contact lens

manga – sleeve > mangeta – hosepipe

mone – money > moneta – coin

orolojo – clock > orolojeta – watch

bove – cow / ox > boveta – calf

ovea – sheep > oveta – lamb

calsa – stocking > calseta – sock

camisa – shirt > camiseta – undershirt / T-shirt

jaca – jacket > jaceta – vest (US) / waistcoat (Br)

pluve – to rain > pluveta – to drizzle

rie – to laugh > rieta – to giggle

parla – to speak > parleta – to chat

-on is added to certain nouns to create a name for a version of something that has been augmented in a particular way. This includes the names of outer garments:

abea – bee > abeon – bumblebee

caxa – box > caxon – crate

dente – tooth > denton – fang / tusk

dito – finger > diton – thumb

padre – father > padron – patriarch / boss

sala – room > salon – living room

seja – chair > sejon – armchair

calsa – stocking > calson – tights / pantyhose

jaca – jacket > jacon – overcoat

-eta and -on are not synonyms for peti and grande: it's quite possible to have un careta grande or un salon peti. Instead, they form words with specific new meanings that can be loosely described as being smaller or larger versions of the original.

A compound noun can be formed by combining a verb with its object, in that order. The result means a person or thing that performs the specified action on the specified object:

corti, ungia – shorten, nail > cortiungia – nail clipper

covre, table – cover, table > covretable – tablecloth

fura, bolsa – steal, handbag > furabolsa – pickpocket

lansa, petra – throw, stone > lansapetra – catapult

para, morde – stop, bite > paramorde – muzzle

para, pluve – stop, rain > parapluve – umbrella

pasa, tempo – pass, time > pasatempo – pastime

porta, mone – carry, money > portamone – wallet

porta, vose – carry, voice > portavose – spokesperson

brinca, dorso – hop, back > brincadorso – leapfrog (the game, named after its players)

If the object begins with a vowel, this is retained unless it's the same as the final vowel of the verb, as in portavion.

LFN does not allow two consecutive nouns to form a compound. Instead, a preposition has to be placed between the two nouns. For example:

avia de mar – seabird

casa per avias – birdhouse

xef de polisia – chief of police

In rare cases, such an expression has a special non-literal meaning and is treated as if it was a single fixed word. For example, a leon-de-mar (sea lion) is not a lion. In such cases, the words are joined with hyphens, and any adjectives follow the second noun. Hyphens can also be used for more literal compounds when this improves clarity:

un leon-de-mar grande – a large sea lion

un leon grande de mar – a large lion from the sea

un avion grande de mar – a large seaplane (because a seaplane is a type of airplane)

un avion-de-mar grande – a large seaplane (alternative)

un avion de mar grande – a large seaplane (ambiguous, because it seems to be saying that the sea is large)